Pipe-joint.



NILS BAASHUUS, OF GHRISTIANIA, NORWAY. 'i

PIPE-JOINT.

Speeication of Letters Patent.

Patented nec. 15,1908.

Appunti@ mea separata 1e, 1907. sera No. 393,042.

To all whom it may concern:

Be it known that I, NILs BAAsHUs, a sub ject of the King of Norway, residing at Chris- .new pipe ]oint, the actual acking rings be-V tiania, Norway,.lhave invented new and useful Improvements in Pipe-Joints, of which the following is aspecification. L My invention relates to improvements in means for connecting pipes and tubes.

According to this invention the joint is packed by a ring of rubber or other soft material being forced automatically, by the pressure existing the pipes to be connected,

i etween converging surfaces, which are so located that the packing can be conveniently inserted, inspected or renewed without access having to be had to the interior of the pipes. The invention also admits of any individual pipe of a line of piping being readily lifted out. Mechanical operations, such as stemming or driving home etc., are obviated, nor-need any bolts, flanges .and the like be employed.

My invention is illustrated in the accompanying drawing, in which- Figure l is a diagrammatic secticnal view illustrating one form of construction of the ing omitted. Fig. 2 yis a li e diagram illusvtrating a modification of thedevice. Fig. 3

is a sectional view of a fragment of the pi e -ointshown in Fig. 1, drawn to a larger sca e. ig. 4 is a like view of a fragment of the pipe ioint shown in Fig. 2, likewise drawn to a arger scale. Fi s. 5-10 are like fragmental sectional views, rawn to ythe same scale as Figs. 3 and 4, of further modifications.

According to the method illustrated',` in

sleeve a., between which and each pipe a gasket ring is inserted. The pipes shown in lgs. 3, 5, and 7, are all connected on this method.V y

On the method illustrated in Fig'. 2, the sleeve a is re laced by a socket c1 on theone pi e b, whic i receives the spigot end of the ot er pipe l)1 and accommodates 'the gasket.l

Fig. 1, the two pipes b, b1 are connected by a vreceive the gasket e.

socket a? on t able cross section, .of soft elastic material,"

andthe inside pressure must have access to ,the rear part of the gasket, so that .the latter is automatically forced into the apical portion fof theconical spa/ce by the pressure in the i es thereby eii'ecting a thoroughly tight ibiiinwithout the usual bolts and other auxilopem'ng being. kept as small as ossible to r iary means beine required. Both pipes b, b1

have socket en s, so that the actual joint-` surface d ofthe pipe lies above the pipe wall f. The advantage of this arrangement is that after suitably shifting the sleeve a,

access can be Ahad to the packing space from without. The gasket cannot slip; into the inside of the pipe owing to the pac ing space being nearly closed on the pressure side by the rib m of the sleeve a. Screws may be employed if desired to prevent .t e. sleeve getting displaced by possible external influences.

Fig. 4 shows a single socket joint in which the inner pipe b1 has a socket which iits into the socket al of the outer pipe b. After telescoping the one ipe into the other, the gasket e can thus Fe set in position from the outside.

outside', and the gasket e can thus beI inserted between the sleeve andthe surface d from` Inythe modification shown in Fig. 5 'the I sleeve a is constituted by a short plain ppe, while the ends of the pipe b, b1 are groove to Displacement of the sleeve by any possible external forces may be l revented by a clamp h (metal strip or the like), which fits over the sleeve and bears against the ipe; or screws may be used in the manner s own in Fig. 3. The O'asket. can be inserted or changed from without ,after shifting of the sleeve. The packing space is y the to prevent the'gasket getpeping. In order sufiiciently closed on the pressure side edge 1 1, of the pipe ting` into the interior of the to enable closed gaskets to ipes b, l)1 may be such as to admit ofplay between them, whereby the gasket can be set in place likewise from without.v If, however, it is not desired to use closed gaskets, -a piece of ordinary (packin around the pipe an close subsequently by means of glue or the like. y In Fig'. 6 'a modification is shown in which the grooved spligot of the pipe-b1 tsmto a employed, thev can 4be passed.

e pipe b, a separate sleeve a The gasket is mserted from without after vi vthe pipes b, b1.

-sured by suitab se aration of the two pi es.

the modification s own in Fig. 7 both the sleeve a and the two pipes b, b1 resent conical surfaces c, d respectively, w ereby annular hollow cones are constituted.

In the constructions shown in Figs. 3 and 4 lthe internal pressure acting upon the gasket ring-e tends to contract it; in the modification illustrated inA Figs. 5 and 6, on the other hand, the tendency of the internal pressureis to stretch the ring e. In either case the alteration of length of the asket may prove disadvanta eous. .With t e anodied construction s own in Fig. 7 alteration of the mean length of the gasket is entirel obvi- -ated or only'benecially affected. 'l e gasket can be inserted, inspected or renewed from without after the sleeve a has been pushed aside. The front ed e of the sleeve may be rounded to facilitate s iding.

Fig. 8 illustrates a modiiication in which the pipe b has a conically shaped socket a1 to receive the spigot'of the pipe b1, there being thus no sleeve andonly one gasket e. The latter can be convemently i'nsertedl from without after separation of the two pipes.

In Figs. 3, 5 and 7 the long members (pipes) are located inside the short members (sleeve). It is obvious, however that the arrangement may be reversed, a short meniber being located inside two long ones '(pipes). Such an arrangement is illustrated n fig 9, where a short muff a. is inserted in Stripls l or the like may be oyed to secure t e sleeve in position. .order to resist the wedging action of the packing, those parts of the jomt which are sub'ect to increased tensile strain must be ma e particularly strong. In the case of the constructions shown in Figs. 3, 5 and 7 sufficient strength can be convenientl ine thickness of the wa s of the sleeve employed. In the constructions l shown in Figs. 4, 6, 8 and 9, for the purpose of obtaining adequate stren h without the walls of the entire pipe (in t e case of rolled pipes) having to be made thicker, only the end portions, subject'to the extrastrain are rendered stronger, which may be done by a rolled 'on flange lc, shrunk on rings or the like.

When no separate sleeve is emplo ed,` as is the-case with the constructions shown in Figs. 4,.6 and 8 it is desirable for the purpose ofladmitting oi new packing be' inserted that each individual pi e should llIow of being shifted in axial 'rection without the neighboring pipes being, disturbed and without the gasketat one end falling out on a new gasket being inserted at the opposite end. For this purpose the socket ortions of the pipes shoul be of ample len as illustrated in Figs. 4 and 6, sov that w en the one end of the pipe is shifted for the purpose of chan the gasket, the ackin s ace at the olllegi end remains covejied. VgVhIdn such arrangement is not adopted, as in the case of inclined or vertical piping, shorter sockets are used as shown 1n Fig. 8, so that the s igot of the one ipe butts against the siioulder of the socliet of the ot er. The construction illustrated in Fig. 8 if modified as shown in Fig. 10 would also admit of shifting of any individual pipe Without disturbance of the adjacent ones.

In the event of separatesleeves or internal mufis being used (as shown in Figs. 3, 5, 7 and 9) a broken pipe can be sim ly lifted out after the sleeve or muif has heen pushed aside. Where there ,is no sleeve or muff used some of the neighboring pipes must also be shifted before the broken pipe can be removed, but the packing of such joints is not disturbed. I

In the various joints illustrated in the drawing a conical packing space is shown with straight walls c, d. It is evident, however, that this form is not strictly necessary, but one at least of the two telescopin mem lbers must present a groove (whose wa s may be straight or curved) and the coperating member must cover the groove in such manner that a packing s ac e is constituted which tapers toward' t e outside and has relatively very narrow o enings at each side.

Having thus describe my invention, I declare that what I claim is- 1. A pipe joint, comprising, a tubular y member presenting an annular groove and a second tubular member fitting the same telescopically and covering the groove so that an annular chamber is constituted ta erin toward the outside and having a re ative narrow opening at each side, which cliamber is readily accessible from without on axial sliding of the one member, that bounding wall of the chamber which is formed by the inner of the two members lyin out of alinement with the exterior wall of t e body of the member, and a packing ring of soft iiexible and elastic material located in said chamber and pressed toward the outer opening of the latter under the action of the fiuid pressure behind the packing, substantially as described.

2. A pipe joint, comprising, two ipes and a sleeve fitting the same telescopica ly, there being presented between it and each ipe an annular chamber ta erin toward tl e outside and having a re ative y narrow opening at each side, which chamber is readily accessible from without on relative axial motion of the sleeve and pi e, that bounding wall of the chamber .whic is constituted by the inner of the two telesco ic members l out of alinement with tiie exterior wahl-I the body of the member, and a ac ring of's'oft iiexible and elastic material located in each chamber and pressed toward the outer chamber is readily accessible from without on axial sliding of the sleeve on the ipes, and a packing ring of soft flexible and e astio materlal located in each chamber and pressed toward the outer o ening of the latter under the action of the uid pressure behind the packing, substantially as described.

4. A p'pe joint, comprising, two pipes the end of each of which presents an annular groove, and a sleeve `consisting of a short plain ipe embracing the two grooved ends where y an annular chamber is constituted taperin toward the -outside and havin a re ative narrow opening at eachy side, which c amber is readily 'accessible from without on axial sliding of the sleeve'on the pipes, and a packing ring of soft flexible and elastic materlal located 1n each chamber and ressed toward the outer opening of the atter under the action of the fluid pressure behind the packing, andmeans for preventl ing the' sleeve accidentally shifting on the pipes, substantially as described.

4o toward the outside'and having al narrow `opening at each side,4

which c amber is readily accessible from without on axial sliding ofthe one member, that bounding wall of the chamber which is formed by'the 'inner of the two members lying out of alinement with the exterior Wall of the body of the member, and la packing ring of soft flexible andelastic material located in each chamber and pressed toward the outer opening of the latter under the action of the fluid pressure behind the packing, the 'permissible extent of telescopic movement of each two intertelescoping members being such that thel packing in the distal-end joint remains in its groove when the one intertelescoping member is axially slid so much relatively to the coperatin member that the -groove at the proxima ljoint is sufficiently exposedlfor `removal of.

its packing, substantia ly as described.

l NILS BAASHUUS.

Witnesses:

EMIL G. PRILLwITz, g KENNETH RoMANEs. 

